此题是考查非谓语动词吗
有这样一道题：
__________ many times，but the boys still couldn’t understand it.
A. Having told B. Though he had been told C. He was told D. Having been told
现分析如下：
此题应选C。容易误选A，D，考生从四个选项中初看一眼便断定此题是考查非谓语动词，这刚好落入了命题者的设置的陷阱。做好此题的关键点在于注意到句中的并列连词but，因为它的存在就表明这是一个并列句，所以前面应是一个完整的句子而不能是一个非谓语动词。
1. ________ask the teacher if you have any questions.
A. Doing B. Do C. To do D. Done
2. ________ hard and you’ll pass the college entrance examinations.
A. study B. studying C. To study D. Studied
3. _________ down the radio —— the baby’s asleep in the next room.
A. Turning B. Turn C. Turned D. To turn
4. On Saturday afternoon，Mrs Green went to the market，________ some fruit and visited her cousin.
A. bought B. buying C. to buy D. buy
5. She set out soon after dark _________ home an hour later.
A. arriving B. to arrive C. having arrived D. and arrived
答案：1. B 2. A 3. B 4. A 5. D